Malicious PDF — malware analysis report

Static analysis result for SHA-256 40f8d81140a4b17a…

MALICIOUS

PDF

78.2 KB Created: 2021-02-19 17:27:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f9d0cfb7694e40705d4e496c496b88ed SHA-1: c9918fd911151af3a28eb5a3fa965f2289a748a9 SHA-256: 40f8d81140a4b17a7942a1240b1e77a6a430162fc60da875699b6d713859c348
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or scam attempt. The document body, though heavily obfuscated, appears to be a lure related to search queries. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://jottigo.ru/123?utm_term=what+is+definition+in+reading+and+writing PDF link annotation
    • http://luxshop21.site/tenufobuz1u43.pdfIn PDF document text
    • http://bodegumuxizobi.22web.org/51590176560.pdfIn PDF document text
    • http://strapslap.online/sairat_jhala_ji_video_songqf28e.pdfIn PDF document text
    • http://hardcreditcheck.info/tahoe_city_weather_reporthpdl9.pdfIn PDF document text
    • https://cdn.sqhk.co/gajeneset/fOAijgf/77844797479.pdfIn PDF document text
    • http://strgb2.ru/donipidobuvigevehc5w.pdfIn PDF document text
    • http://sodiwemewobigi.22web.org/basic_english_tutorial.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/hd9TOmP/pumud.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485800/normal_5fed2b0962203.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lososimap/31378170759.pdfIn PDF document text
    • http://texatutegelemov.rf.gd/50239524608.pdfIn PDF document text
    • http://ramejepazino.rf.gd/43043574187.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/poojai_tamil_movie_bittorrent.pdfIn PDF document text
    • http://wewuvizab.epizy.com/gene_autry_tv_show_episode_guide.pdfIn PDF document text
    • http://gifibulilak.epizy.com/xubokimebewupamag.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/54052123597.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/wapking_hd_video_songs_2019.pdfIn PDF document text
    • http://nafivinada.rf.gd/47213977816.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000deec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEEC 5244 bytes
SHA-256: 8f4b6cbc95322504528b8ffd21971356c77ecaff3bea78d91806dabf98d86288
font_01_sfnt_off0000f0d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D5 11168 bytes
SHA-256: bbb698f3188dee5d6d8cf85d0687e80a5a52a62b27b0a63fa8ef22917e597b9b
font_02_sfnt_off000115f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115F0 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449

Open this report in the interactive analyzer, or submit your own file for analysis.